1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * BRIEF MODULE DESCRIPTION 4 * Au1100 LCD Driver. 5 * 6 * Rewritten for 2.6 by Embedded Alley Solutions 7 * <source@embeddedalley.com>, based on submissions by 8 * Karl Lessard <klessard@sunrisetelecom.com> 9 * <c.pellegrin@exadron.com> 10 * 11 * PM support added by Rodolfo Giometti <giometti@linux.it> 12 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it> 13 * 14 * Copyright 2002 MontaVista Software 15 * Author: MontaVista Software, Inc. 16 * ppopov@mvista.com or source@mvista.com 17 * 18 * Copyright 2002 Alchemy Semiconductor 19 * Author: Alchemy Semiconductor 20 * 21 * Based on: 22 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device 23 * Created 28 Dec 1997 by Geert Uytterhoeven 24 */ 25 26 #define pr_fmt(fmt) "au1100fb:" fmt "\n" 27 28 #include <linux/clk.h> 29 #include <linux/delay.h> 30 #include <linux/io.h> 31 #include <linux/module.h> 32 #include <linux/kernel.h> 33 #include <linux/errno.h> 34 #include <linux/string.h> 35 #include <linux/mm.h> 36 #include <linux/fb.h> 37 #include <linux/init.h> 38 #include <linux/interrupt.h> 39 #include <linux/ctype.h> 40 #include <linux/dma-mapping.h> 41 #include <linux/platform_device.h> 42 #include <linux/slab.h> 43 44 #if defined(__BIG_ENDIAN) 45 #define LCD_CONTROL_DEFAULT_PO LCD_CONTROL_PO_11 46 #else 47 #define LCD_CONTROL_DEFAULT_PO LCD_CONTROL_PO_00 48 #endif 49 #define LCD_CONTROL_DEFAULT_SBPPF LCD_CONTROL_SBPPF_565 50 51 /********************************************************************/ 52 53 /* LCD controller restrictions */ 54 #define AU1100_LCD_MAX_XRES 800 55 #define AU1100_LCD_MAX_YRES 600 56 #define AU1100_LCD_MAX_BPP 16 57 #define AU1100_LCD_MAX_CLK 48000000 58 #define AU1100_LCD_NBR_PALETTE_ENTRIES 256 59 60 /* Default number of visible screen buffer to allocate */ 61 #define AU1100FB_NBR_VIDEO_BUFFERS 4 62 63 /********************************************************************/ 64 65 struct au1100fb_panel 66 { 67 const char name[25]; /* Full name <vendor>_<model> */ 68 69 u32 control_base; /* Mode-independent control values */ 70 u32 clkcontrol_base; /* Panel pixclock preferences */ 71 72 u32 horztiming; 73 u32 verttiming; 74 75 u32 xres; /* Maximum horizontal resolution */ 76 u32 yres; /* Maximum vertical resolution */ 77 u32 bpp; /* Maximum depth supported */ 78 }; 79 80 struct au1100fb_regs 81 { 82 u32 lcd_control; 83 u32 lcd_intstatus; 84 u32 lcd_intenable; 85 u32 lcd_horztiming; 86 u32 lcd_verttiming; 87 u32 lcd_clkcontrol; 88 u32 lcd_dmaaddr0; 89 u32 lcd_dmaaddr1; 90 u32 lcd_words; 91 u32 lcd_pwmdiv; 92 u32 lcd_pwmhi; 93 u32 reserved[(0x0400-0x002C)/4]; 94 u32 lcd_palettebase[256]; 95 }; 96 97 struct au1100fb_device { 98 99 struct fb_info info; /* FB driver info record */ 100 101 struct au1100fb_panel *panel; /* Panel connected to this device */ 102 103 struct au1100fb_regs* regs; /* Registers memory map */ 104 size_t regs_len; 105 unsigned int regs_phys; 106 107 #ifdef CONFIG_PM 108 /* stores the register values during suspend */ 109 struct au1100fb_regs pm_regs; 110 #endif 111 112 unsigned char* fb_mem; /* FrameBuffer memory map */ 113 size_t fb_len; 114 dma_addr_t fb_phys; 115 int panel_idx; 116 struct clk *lcdclk; 117 struct device *dev; 118 }; 119 120 /********************************************************************/ 121 122 #define LCD_CONTROL (AU1100_LCD_BASE + 0x0) 123 #define LCD_CONTROL_SBB_BIT 21 124 #define LCD_CONTROL_SBB_MASK (0x3 << LCD_CONTROL_SBB_BIT) 125 #define LCD_CONTROL_SBB_1 (0 << LCD_CONTROL_SBB_BIT) 126 #define LCD_CONTROL_SBB_2 (1 << LCD_CONTROL_SBB_BIT) 127 #define LCD_CONTROL_SBB_3 (2 << LCD_CONTROL_SBB_BIT) 128 #define LCD_CONTROL_SBB_4 (3 << LCD_CONTROL_SBB_BIT) 129 #define LCD_CONTROL_SBPPF_BIT 18 130 #define LCD_CONTROL_SBPPF_MASK (0x7 << LCD_CONTROL_SBPPF_BIT) 131 #define LCD_CONTROL_SBPPF_655 (0 << LCD_CONTROL_SBPPF_BIT) 132 #define LCD_CONTROL_SBPPF_565 (1 << LCD_CONTROL_SBPPF_BIT) 133 #define LCD_CONTROL_SBPPF_556 (2 << LCD_CONTROL_SBPPF_BIT) 134 #define LCD_CONTROL_SBPPF_1555 (3 << LCD_CONTROL_SBPPF_BIT) 135 #define LCD_CONTROL_SBPPF_5551 (4 << LCD_CONTROL_SBPPF_BIT) 136 #define LCD_CONTROL_WP (1<<17) 137 #define LCD_CONTROL_WD (1<<16) 138 #define LCD_CONTROL_C (1<<15) 139 #define LCD_CONTROL_SM_BIT 13 140 #define LCD_CONTROL_SM_MASK (0x3 << LCD_CONTROL_SM_BIT) 141 #define LCD_CONTROL_SM_0 (0 << LCD_CONTROL_SM_BIT) 142 #define LCD_CONTROL_SM_90 (1 << LCD_CONTROL_SM_BIT) 143 #define LCD_CONTROL_SM_180 (2 << LCD_CONTROL_SM_BIT) 144 #define LCD_CONTROL_SM_270 (3 << LCD_CONTROL_SM_BIT) 145 #define LCD_CONTROL_DB (1<<12) 146 #define LCD_CONTROL_CCO (1<<11) 147 #define LCD_CONTROL_DP (1<<10) 148 #define LCD_CONTROL_PO_BIT 8 149 #define LCD_CONTROL_PO_MASK (0x3 << LCD_CONTROL_PO_BIT) 150 #define LCD_CONTROL_PO_00 (0 << LCD_CONTROL_PO_BIT) 151 #define LCD_CONTROL_PO_01 (1 << LCD_CONTROL_PO_BIT) 152 #define LCD_CONTROL_PO_10 (2 << LCD_CONTROL_PO_BIT) 153 #define LCD_CONTROL_PO_11 (3 << LCD_CONTROL_PO_BIT) 154 #define LCD_CONTROL_MPI (1<<7) 155 #define LCD_CONTROL_PT (1<<6) 156 #define LCD_CONTROL_PC (1<<5) 157 #define LCD_CONTROL_BPP_BIT 1 158 #define LCD_CONTROL_BPP_MASK (0x7 << LCD_CONTROL_BPP_BIT) 159 #define LCD_CONTROL_BPP_1 (0 << LCD_CONTROL_BPP_BIT) 160 #define LCD_CONTROL_BPP_2 (1 << LCD_CONTROL_BPP_BIT) 161 #define LCD_CONTROL_BPP_4 (2 << LCD_CONTROL_BPP_BIT) 162 #define LCD_CONTROL_BPP_8 (3 << LCD_CONTROL_BPP_BIT) 163 #define LCD_CONTROL_BPP_12 (4 << LCD_CONTROL_BPP_BIT) 164 #define LCD_CONTROL_BPP_16 (5 << LCD_CONTROL_BPP_BIT) 165 #define LCD_CONTROL_GO (1<<0) 166 167 #define LCD_INTSTATUS (AU1100_LCD_BASE + 0x4) 168 #define LCD_INTENABLE (AU1100_LCD_BASE + 0x8) 169 #define LCD_INT_SD (1<<7) 170 #define LCD_INT_OF (1<<6) 171 #define LCD_INT_UF (1<<5) 172 #define LCD_INT_SA (1<<3) 173 #define LCD_INT_SS (1<<2) 174 #define LCD_INT_S1 (1<<1) 175 #define LCD_INT_S0 (1<<0) 176 177 #define LCD_HORZTIMING (AU1100_LCD_BASE + 0xC) 178 #define LCD_HORZTIMING_HN2_BIT 24 179 #define LCD_HORZTIMING_HN2_MASK (0xFF << LCD_HORZTIMING_HN2_BIT) 180 #define LCD_HORZTIMING_HN2_N(N) ((((N)-1) << LCD_HORZTIMING_HN2_BIT) & LCD_HORZTIMING_HN2_MASK) 181 #define LCD_HORZTIMING_HN1_BIT 16 182 #define LCD_HORZTIMING_HN1_MASK (0xFF << LCD_HORZTIMING_HN1_BIT) 183 #define LCD_HORZTIMING_HN1_N(N) ((((N)-1) << LCD_HORZTIMING_HN1_BIT) & LCD_HORZTIMING_HN1_MASK) 184 #define LCD_HORZTIMING_HPW_BIT 10 185 #define LCD_HORZTIMING_HPW_MASK (0x3F << LCD_HORZTIMING_HPW_BIT) 186 #define LCD_HORZTIMING_HPW_N(N) ((((N)-1) << LCD_HORZTIMING_HPW_BIT) & LCD_HORZTIMING_HPW_MASK) 187 #define LCD_HORZTIMING_PPL_BIT 0 188 #define LCD_HORZTIMING_PPL_MASK (0x3FF << LCD_HORZTIMING_PPL_BIT) 189 #define LCD_HORZTIMING_PPL_N(N) ((((N)-1) << LCD_HORZTIMING_PPL_BIT) & LCD_HORZTIMING_PPL_MASK) 190 191 #define LCD_VERTTIMING (AU1100_LCD_BASE + 0x10) 192 #define LCD_VERTTIMING_VN2_BIT 24 193 #define LCD_VERTTIMING_VN2_MASK (0xFF << LCD_VERTTIMING_VN2_BIT) 194 #define LCD_VERTTIMING_VN2_N(N) ((((N)-1) << LCD_VERTTIMING_VN2_BIT) & LCD_VERTTIMING_VN2_MASK) 195 #define LCD_VERTTIMING_VN1_BIT 16 196 #define LCD_VERTTIMING_VN1_MASK (0xFF << LCD_VERTTIMING_VN1_BIT) 197 #define LCD_VERTTIMING_VN1_N(N) ((((N)-1) << LCD_VERTTIMING_VN1_BIT) & LCD_VERTTIMING_VN1_MASK) 198 #define LCD_VERTTIMING_VPW_BIT 10 199 #define LCD_VERTTIMING_VPW_MASK (0x3F << LCD_VERTTIMING_VPW_BIT) 200 #define LCD_VERTTIMING_VPW_N(N) ((((N)-1) << LCD_VERTTIMING_VPW_BIT) & LCD_VERTTIMING_VPW_MASK) 201 #define LCD_VERTTIMING_LPP_BIT 0 202 #define LCD_VERTTIMING_LPP_MASK (0x3FF << LCD_VERTTIMING_LPP_BIT) 203 #define LCD_VERTTIMING_LPP_N(N) ((((N)-1) << LCD_VERTTIMING_LPP_BIT) & LCD_VERTTIMING_LPP_MASK) 204 205 #define LCD_CLKCONTROL (AU1100_LCD_BASE + 0x14) 206 #define LCD_CLKCONTROL_IB (1<<18) 207 #define LCD_CLKCONTROL_IC (1<<17) 208 #define LCD_CLKCONTROL_IH (1<<16) 209 #define LCD_CLKCONTROL_IV (1<<15) 210 #define LCD_CLKCONTROL_BF_BIT 10 211 #define LCD_CLKCONTROL_BF_MASK (0x1F << LCD_CLKCONTROL_BF_BIT) 212 #define LCD_CLKCONTROL_BF_N(N) ((((N)-1) << LCD_CLKCONTROL_BF_BIT) & LCD_CLKCONTROL_BF_MASK) 213 #define LCD_CLKCONTROL_PCD_BIT 0 214 #define LCD_CLKCONTROL_PCD_MASK (0x3FF << LCD_CLKCONTROL_PCD_BIT) 215 #define LCD_CLKCONTROL_PCD_N(N) (((N) << LCD_CLKCONTROL_PCD_BIT) & LCD_CLKCONTROL_PCD_MASK) 216 217 #define LCD_DMAADDR0 (AU1100_LCD_BASE + 0x18) 218 #define LCD_DMAADDR1 (AU1100_LCD_BASE + 0x1C) 219 #define LCD_DMA_SA_BIT 5 220 #define LCD_DMA_SA_MASK (0x7FFFFFF << LCD_DMA_SA_BIT) 221 #define LCD_DMA_SA_N(N) ((N) & LCD_DMA_SA_MASK) 222 223 #define LCD_WORDS (AU1100_LCD_BASE + 0x20) 224 #define LCD_WRD_WRDS_BIT 0 225 #define LCD_WRD_WRDS_MASK (0xFFFFFFFF << LCD_WRD_WRDS_BIT) 226 #define LCD_WRD_WRDS_N(N) ((((N)-1) << LCD_WRD_WRDS_BIT) & LCD_WRD_WRDS_MASK) 227 228 #define LCD_PWMDIV (AU1100_LCD_BASE + 0x24) 229 #define LCD_PWMDIV_EN (1<<12) 230 #define LCD_PWMDIV_PWMDIV_BIT 0 231 #define LCD_PWMDIV_PWMDIV_MASK (0xFFF << LCD_PWMDIV_PWMDIV_BIT) 232 #define LCD_PWMDIV_PWMDIV_N(N) ((((N)-1) << LCD_PWMDIV_PWMDIV_BIT) & LCD_PWMDIV_PWMDIV_MASK) 233 234 #define LCD_PWMHI (AU1100_LCD_BASE + 0x28) 235 #define LCD_PWMHI_PWMHI1_BIT 12 236 #define LCD_PWMHI_PWMHI1_MASK (0xFFF << LCD_PWMHI_PWMHI1_BIT) 237 #define LCD_PWMHI_PWMHI1_N(N) (((N) << LCD_PWMHI_PWMHI1_BIT) & LCD_PWMHI_PWMHI1_MASK) 238 #define LCD_PWMHI_PWMHI0_BIT 0 239 #define LCD_PWMHI_PWMHI0_MASK (0xFFF << LCD_PWMHI_PWMHI0_BIT) 240 #define LCD_PWMHI_PWMHI0_N(N) (((N) << LCD_PWMHI_PWMHI0_BIT) & LCD_PWMHI_PWMHI0_MASK) 241 242 #define LCD_PALLETTEBASE (AU1100_LCD_BASE + 0x400) 243 #define LCD_PALLETTE_MONO_MI_BIT 0 244 #define LCD_PALLETTE_MONO_MI_MASK (0xF << LCD_PALLETTE_MONO_MI_BIT) 245 #define LCD_PALLETTE_MONO_MI_N(N) (((N)<< LCD_PALLETTE_MONO_MI_BIT) & LCD_PALLETTE_MONO_MI_MASK) 246 247 #define LCD_PALLETTE_COLOR_RI_BIT 8 248 #define LCD_PALLETTE_COLOR_RI_MASK (0xF << LCD_PALLETTE_COLOR_RI_BIT) 249 #define LCD_PALLETTE_COLOR_RI_N(N) (((N)<< LCD_PALLETTE_COLOR_RI_BIT) & LCD_PALLETTE_COLOR_RI_MASK) 250 #define LCD_PALLETTE_COLOR_GI_BIT 4 251 #define LCD_PALLETTE_COLOR_GI_MASK (0xF << LCD_PALLETTE_COLOR_GI_BIT) 252 #define LCD_PALLETTE_COLOR_GI_N(N) (((N)<< LCD_PALLETTE_COLOR_GI_BIT) & LCD_PALLETTE_COLOR_GI_MASK) 253 #define LCD_PALLETTE_COLOR_BI_BIT 0 254 #define LCD_PALLETTE_COLOR_BI_MASK (0xF << LCD_PALLETTE_COLOR_BI_BIT) 255 #define LCD_PALLETTE_COLOR_BI_N(N) (((N)<< LCD_PALLETTE_COLOR_BI_BIT) & LCD_PALLETTE_COLOR_BI_MASK) 256 257 #define LCD_PALLETTE_TFT_DC_BIT 0 258 #define LCD_PALLETTE_TFT_DC_MASK (0xFFFF << LCD_PALLETTE_TFT_DC_BIT) 259 #define LCD_PALLETTE_TFT_DC_N(N) (((N)<< LCD_PALLETTE_TFT_DC_BIT) & LCD_PALLETTE_TFT_DC_MASK) 260 261 /********************************************************************/ 262 263 /* List of panels known to work with the AU1100 LCD controller. 264 * To add a new panel, enter the same specifications as the 265 * Generic_TFT one, and MAKE SURE that it doesn't conflicts 266 * with the controller restrictions. Restrictions are: 267 * 268 * STN color panels: max_bpp <= 12 269 * STN mono panels: max_bpp <= 4 270 * TFT panels: max_bpp <= 16 271 * max_xres <= 800 272 * max_yres <= 600 273 */ 274 static struct au1100fb_panel known_lcd_panels[] = 275 { 276 /* 800x600x16bpp CRT */ 277 [0] = { 278 .name = "CRT_800x600_16", 279 .xres = 800, 280 .yres = 600, 281 .bpp = 16, 282 .control_base = 0x0004886A | 283 LCD_CONTROL_DEFAULT_PO | LCD_CONTROL_DEFAULT_SBPPF | 284 LCD_CONTROL_BPP_16 | LCD_CONTROL_SBB_4, 285 .clkcontrol_base = 0x00020000, 286 .horztiming = 0x005aff1f, 287 .verttiming = 0x16000e57, 288 }, 289 /* just the standard LCD */ 290 [1] = { 291 .name = "WWPC LCD", 292 .xres = 240, 293 .yres = 320, 294 .bpp = 16, 295 .control_base = 0x0006806A, 296 .horztiming = 0x0A1010EF, 297 .verttiming = 0x0301013F, 298 .clkcontrol_base = 0x00018001, 299 }, 300 /* Sharp 320x240 TFT panel */ 301 [2] = { 302 .name = "Sharp_LQ038Q5DR01", 303 .xres = 320, 304 .yres = 240, 305 .bpp = 16, 306 .control_base = 307 ( LCD_CONTROL_SBPPF_565 308 | LCD_CONTROL_C 309 | LCD_CONTROL_SM_0 310 | LCD_CONTROL_DEFAULT_PO 311 | LCD_CONTROL_PT 312 | LCD_CONTROL_PC 313 | LCD_CONTROL_BPP_16 ), 314 .horztiming = 315 ( LCD_HORZTIMING_HN2_N(8) 316 | LCD_HORZTIMING_HN1_N(60) 317 | LCD_HORZTIMING_HPW_N(12) 318 | LCD_HORZTIMING_PPL_N(320) ), 319 .verttiming = 320 ( LCD_VERTTIMING_VN2_N(5) 321 | LCD_VERTTIMING_VN1_N(17) 322 | LCD_VERTTIMING_VPW_N(1) 323 | LCD_VERTTIMING_LPP_N(240) ), 324 .clkcontrol_base = LCD_CLKCONTROL_PCD_N(1), 325 }, 326 327 /* Hitachi SP14Q005 and possibly others */ 328 [3] = { 329 .name = "Hitachi_SP14Qxxx", 330 .xres = 320, 331 .yres = 240, 332 .bpp = 4, 333 .control_base = 334 ( LCD_CONTROL_C 335 | LCD_CONTROL_BPP_4 ), 336 .horztiming = 337 ( LCD_HORZTIMING_HN2_N(1) 338 | LCD_HORZTIMING_HN1_N(1) 339 | LCD_HORZTIMING_HPW_N(1) 340 | LCD_HORZTIMING_PPL_N(320) ), 341 .verttiming = 342 ( LCD_VERTTIMING_VN2_N(1) 343 | LCD_VERTTIMING_VN1_N(1) 344 | LCD_VERTTIMING_VPW_N(1) 345 | LCD_VERTTIMING_LPP_N(240) ), 346 .clkcontrol_base = LCD_CLKCONTROL_PCD_N(4), 347 }, 348 349 /* Generic 640x480 TFT panel */ 350 [4] = { 351 .name = "TFT_640x480_16", 352 .xres = 640, 353 .yres = 480, 354 .bpp = 16, 355 .control_base = 0x004806a | LCD_CONTROL_DEFAULT_PO, 356 .horztiming = 0x3434d67f, 357 .verttiming = 0x0e0e39df, 358 .clkcontrol_base = LCD_CLKCONTROL_PCD_N(1), 359 }, 360 361 /* Pb1100 LCDB 640x480 PrimeView TFT panel */ 362 [5] = { 363 .name = "PrimeView_640x480_16", 364 .xres = 640, 365 .yres = 480, 366 .bpp = 16, 367 .control_base = 0x0004886a | LCD_CONTROL_DEFAULT_PO, 368 .horztiming = 0x0e4bfe7f, 369 .verttiming = 0x210805df, 370 .clkcontrol_base = 0x00038001, 371 }, 372 }; 373 374 /********************************************************************/ 375 376 /* Inline helpers */ 377 378 #define panel_is_dual(panel) (panel->control_base & LCD_CONTROL_DP) 379 #define panel_is_active(panel)(panel->control_base & LCD_CONTROL_PT) 380 #define panel_is_color(panel) (panel->control_base & LCD_CONTROL_PC) 381 #define panel_swap_rgb(panel) (panel->control_base & LCD_CONTROL_CCO) 382 383 #if defined(CONFIG_COMPILE_TEST) && !defined(CONFIG_MIPS) 384 /* This is only defined to be able to compile this driver on non-mips platforms */ 385 #define KSEG1ADDR(x) (x) 386 #endif 387 388 #define DRIVER_NAME "au1100fb" 389 #define DRIVER_DESC "LCD controller driver for AU1100 processors" 390 391 #define to_au1100fb_device(_info) \ 392 (_info ? container_of(_info, struct au1100fb_device, info) : NULL); 393 394 /* Bitfields format supported by the controller. Note that the order of formats 395 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the 396 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF] 397 */ 398 struct fb_bitfield rgb_bitfields[][4] = 399 { 400 /* Red, Green, Blue, Transp */ 401 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 402 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } }, 403 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } }, 404 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } }, 405 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } }, 406 407 /* The last is used to describe 12bpp format */ 408 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } }, 409 }; 410 411 /* fb_blank 412 * Blank the screen. Depending on the mode, the screen will be 413 * activated with the backlight color, or desactivated 414 */ 415 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi) 416 { 417 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 418 419 pr_devel("fb_blank %d %p", blank_mode, fbi); 420 421 switch (blank_mode) { 422 423 case VESA_NO_BLANKING: 424 /* Turn on panel */ 425 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 426 wmb(); /* drain writebuffer */ 427 break; 428 429 case VESA_VSYNC_SUSPEND: 430 case VESA_HSYNC_SUSPEND: 431 case VESA_POWERDOWN: 432 /* Turn off panel */ 433 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 434 wmb(); /* drain writebuffer */ 435 break; 436 default: 437 break; 438 439 } 440 return 0; 441 } 442 443 /* 444 * Set hardware with var settings. This will enable the controller with a specific 445 * mode, normally validated with the fb_check_var method 446 */ 447 static int au1100fb_setmode(struct au1100fb_device *fbdev) 448 { 449 struct fb_info *info; 450 u32 words; 451 int index; 452 453 if (!fbdev) 454 return -EINVAL; 455 456 info = &fbdev->info; 457 458 /* Update var-dependent FB info */ 459 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) { 460 if (info->var.bits_per_pixel <= 8) { 461 /* palettized */ 462 info->var.red.offset = 0; 463 info->var.red.length = info->var.bits_per_pixel; 464 info->var.red.msb_right = 0; 465 466 info->var.green.offset = 0; 467 info->var.green.length = info->var.bits_per_pixel; 468 info->var.green.msb_right = 0; 469 470 info->var.blue.offset = 0; 471 info->var.blue.length = info->var.bits_per_pixel; 472 info->var.blue.msb_right = 0; 473 474 info->var.transp.offset = 0; 475 info->var.transp.length = 0; 476 info->var.transp.msb_right = 0; 477 478 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 479 info->fix.line_length = info->var.xres_virtual / 480 (8/info->var.bits_per_pixel); 481 } else { 482 /* non-palettized */ 483 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT; 484 info->var.red = rgb_bitfields[index][0]; 485 info->var.green = rgb_bitfields[index][1]; 486 info->var.blue = rgb_bitfields[index][2]; 487 info->var.transp = rgb_bitfields[index][3]; 488 489 info->fix.visual = FB_VISUAL_TRUECOLOR; 490 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */ 491 } 492 } else { 493 /* mono */ 494 info->fix.visual = FB_VISUAL_MONO10; 495 info->fix.line_length = info->var.xres_virtual / 8; 496 } 497 498 info->screen_size = info->fix.line_length * info->var.yres_virtual; 499 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \ 500 >> LCD_CONTROL_SM_BIT) * 90; 501 502 /* Determine BPP mode and format */ 503 fbdev->regs->lcd_control = fbdev->panel->control_base; 504 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming; 505 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming; 506 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base; 507 fbdev->regs->lcd_intenable = 0; 508 fbdev->regs->lcd_intstatus = 0; 509 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys); 510 511 if (panel_is_dual(fbdev->panel)) { 512 /* Second panel display seconf half of screen if possible, 513 * otherwise display the same as the first panel */ 514 if (info->var.yres_virtual >= (info->var.yres << 1)) { 515 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys + 516 (info->fix.line_length * 517 (info->var.yres_virtual >> 1))); 518 } else { 519 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys); 520 } 521 } 522 523 words = info->fix.line_length / sizeof(u32); 524 if (!info->var.rotate || (info->var.rotate == 180)) { 525 words *= info->var.yres_virtual; 526 if (info->var.rotate /* 180 */) { 527 words -= (words % 8); /* should be divisable by 8 */ 528 } 529 } 530 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words); 531 532 fbdev->regs->lcd_pwmdiv = 0; 533 fbdev->regs->lcd_pwmhi = 0; 534 535 /* Resume controller */ 536 fbdev->regs->lcd_control |= LCD_CONTROL_GO; 537 mdelay(10); 538 au1100fb_fb_blank(VESA_NO_BLANKING, info); 539 540 return 0; 541 } 542 543 /* fb_setcolreg 544 * Set color in LCD palette. 545 */ 546 static int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, 547 unsigned transp, struct fb_info *fbi) 548 { 549 struct au1100fb_device *fbdev; 550 u32 *palette; 551 u32 value; 552 553 fbdev = to_au1100fb_device(fbi); 554 palette = fbdev->regs->lcd_palettebase; 555 556 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1)) 557 return -EINVAL; 558 559 if (fbi->var.grayscale) { 560 /* Convert color to grayscale */ 561 red = green = blue = 562 (19595 * red + 38470 * green + 7471 * blue) >> 16; 563 } 564 565 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) { 566 /* Place color in the pseudopalette */ 567 if (regno > 16) 568 return -EINVAL; 569 570 palette = (u32*)fbi->pseudo_palette; 571 572 red >>= (16 - fbi->var.red.length); 573 green >>= (16 - fbi->var.green.length); 574 blue >>= (16 - fbi->var.blue.length); 575 576 value = (red << fbi->var.red.offset) | 577 (green << fbi->var.green.offset)| 578 (blue << fbi->var.blue.offset); 579 value &= 0xFFFF; 580 581 } else if (panel_is_active(fbdev->panel)) { 582 /* COLOR TFT PALLETTIZED (use RGB 565) */ 583 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F); 584 value &= 0xFFFF; 585 586 } else if (panel_is_color(fbdev->panel)) { 587 /* COLOR STN MODE */ 588 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) | 589 ((green >> 8) & 0x00F0) | 590 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00); 591 value &= 0xFFF; 592 } else { 593 /* MONOCHROME MODE */ 594 value = (green >> 12) & 0x000F; 595 value &= 0xF; 596 } 597 598 palette[regno] = value; 599 600 return 0; 601 } 602 603 /* fb_pan_display 604 * Pan display in x and/or y as specified 605 */ 606 static int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) 607 { 608 struct au1100fb_device *fbdev; 609 int dy; 610 611 fbdev = to_au1100fb_device(fbi); 612 613 pr_devel("fb_pan_display %p %p", var, fbi); 614 615 if (!var || !fbdev) { 616 return -EINVAL; 617 } 618 619 if (var->xoffset - fbi->var.xoffset) { 620 /* No support for X panning for now! */ 621 return -EINVAL; 622 } 623 624 pr_devel("fb_pan_display 2 %p %p", var, fbi); 625 dy = var->yoffset - fbi->var.yoffset; 626 if (dy) { 627 628 u32 dmaaddr; 629 630 pr_devel("Panning screen of %d lines", dy); 631 632 dmaaddr = fbdev->regs->lcd_dmaaddr0; 633 dmaaddr += (fbi->fix.line_length * dy); 634 635 /* TODO: Wait for current frame to finished */ 636 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 637 638 if (panel_is_dual(fbdev->panel)) { 639 dmaaddr = fbdev->regs->lcd_dmaaddr1; 640 dmaaddr += (fbi->fix.line_length * dy); 641 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr); 642 } 643 } 644 pr_devel("fb_pan_display 3 %p %p", var, fbi); 645 646 return 0; 647 } 648 649 /* fb_mmap 650 * Map video memory in user space. We don't use the generic fb_mmap method mainly 651 * to allow the use of the TLB streaming flag (CCA=6) 652 */ 653 static int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) 654 { 655 struct au1100fb_device *fbdev = to_au1100fb_device(fbi); 656 657 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); 658 659 #ifndef CONFIG_S390 660 /* On s390 pgprot_val() is a function and thus not a lvalue */ 661 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 662 #endif 663 664 return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys, 665 fbdev->fb_len); 666 } 667 668 static const struct fb_ops au1100fb_ops = { 669 .owner = THIS_MODULE, 670 __FB_DEFAULT_IOMEM_OPS_RDWR, 671 .fb_setcolreg = au1100fb_fb_setcolreg, 672 .fb_blank = au1100fb_fb_blank, 673 .fb_pan_display = au1100fb_fb_pan_display, 674 __FB_DEFAULT_IOMEM_OPS_DRAW, 675 .fb_mmap = au1100fb_fb_mmap, 676 }; 677 678 679 /*-------------------------------------------------------------------------*/ 680 681 static int au1100fb_setup(struct au1100fb_device *fbdev) 682 { 683 char *this_opt, *options; 684 int num_panels = ARRAY_SIZE(known_lcd_panels); 685 686 if (num_panels <= 0) { 687 pr_err("No LCD panels supported by driver!"); 688 return -ENODEV; 689 } 690 691 if (fb_get_options(DRIVER_NAME, &options)) 692 return -ENODEV; 693 if (!options) 694 return -ENODEV; 695 696 while ((this_opt = strsep(&options, ",")) != NULL) { 697 /* Panel option */ 698 if (!strncmp(this_opt, "panel:", 6)) { 699 int i; 700 this_opt += 6; 701 for (i = 0; i < num_panels; i++) { 702 if (!strncmp(this_opt, known_lcd_panels[i].name, 703 strlen(this_opt))) { 704 fbdev->panel = &known_lcd_panels[i]; 705 fbdev->panel_idx = i; 706 break; 707 } 708 } 709 if (i >= num_panels) { 710 pr_warn("Panel '%s' not supported!", this_opt); 711 return -ENODEV; 712 } 713 } 714 /* Unsupported option */ 715 else 716 pr_warn("Unsupported option \"%s\"", this_opt); 717 } 718 719 pr_info("Panel=%s", fbdev->panel->name); 720 721 return 0; 722 } 723 724 static int au1100fb_drv_probe(struct platform_device *dev) 725 { 726 struct au1100fb_device *fbdev; 727 struct resource *regs_res; 728 struct clk *c; 729 730 /* Allocate new device private */ 731 fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL); 732 if (!fbdev) 733 return -ENOMEM; 734 735 if (au1100fb_setup(fbdev)) 736 goto failed; 737 738 platform_set_drvdata(dev, (void *)fbdev); 739 fbdev->dev = &dev->dev; 740 741 /* Allocate region for our registers and map them */ 742 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0); 743 if (!regs_res) { 744 pr_err("fail to retrieve registers resource"); 745 return -EFAULT; 746 } 747 748 fbdev->info.fix = (struct fb_fix_screeninfo) { 749 .mmio_start = regs_res->start, 750 .mmio_len = resource_size(regs_res), 751 .id = "AU1100 FB", 752 .xpanstep = 1, 753 .ypanstep = 1, 754 .type = FB_TYPE_PACKED_PIXELS, 755 .accel = FB_ACCEL_NONE, 756 }; 757 758 if (!devm_request_mem_region(&dev->dev, 759 fbdev->info.fix.mmio_start, 760 fbdev->info.fix.mmio_len, 761 DRIVER_NAME)) { 762 pr_err("fail to lock memory region at 0x%08lx", 763 fbdev->info.fix.mmio_start); 764 return -EBUSY; 765 } 766 767 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(fbdev->info.fix.mmio_start); 768 769 pr_devel("Register memory map at %p", fbdev->regs); 770 pr_devel("phys=0x%08x, size=%zu", fbdev->regs_phys, fbdev->regs_len); 771 772 c = clk_get(NULL, "lcd_intclk"); 773 if (!IS_ERR(c)) { 774 fbdev->lcdclk = c; 775 clk_set_rate(c, 48000000); 776 clk_prepare_enable(c); 777 } 778 779 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ 780 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * 781 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; 782 783 fbdev->fb_mem = dmam_alloc_coherent(&dev->dev, 784 PAGE_ALIGN(fbdev->fb_len), 785 &fbdev->fb_phys, GFP_KERNEL); 786 if (!fbdev->fb_mem) { 787 pr_err("fail to allocate framebuffer (size: %zuK))", 788 fbdev->fb_len / 1024); 789 return -ENOMEM; 790 } 791 792 fbdev->info.fix.smem_start = fbdev->fb_phys; 793 fbdev->info.fix.smem_len = fbdev->fb_len; 794 795 pr_devel("Framebuffer memory map at %p", fbdev->fb_mem); 796 pr_devel("phys=0x%pad, size=%zuK", &fbdev->fb_phys, fbdev->fb_len / 1024); 797 798 /* load the panel info into the var struct */ 799 fbdev->info.var = (struct fb_var_screeninfo) { 800 .activate = FB_ACTIVATE_NOW, 801 .height = -1, 802 .width = -1, 803 .vmode = FB_VMODE_NONINTERLACED, 804 .bits_per_pixel = fbdev->panel->bpp, 805 .xres = fbdev->panel->xres, 806 .xres_virtual = fbdev->panel->xres, 807 .yres = fbdev->panel->yres, 808 .yres_virtual = fbdev->panel->yres, 809 }; 810 811 fbdev->info.screen_base = fbdev->fb_mem; 812 fbdev->info.fbops = &au1100fb_ops; 813 814 fbdev->info.pseudo_palette = 815 devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL); 816 if (!fbdev->info.pseudo_palette) 817 return -ENOMEM; 818 819 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { 820 pr_err("Fail to allocate colormap (%d entries)", 821 AU1100_LCD_NBR_PALETTE_ENTRIES); 822 return -EFAULT; 823 } 824 825 /* Set h/w registers */ 826 au1100fb_setmode(fbdev); 827 828 /* Register new framebuffer */ 829 if (register_framebuffer(&fbdev->info) < 0) { 830 pr_err("cannot register new framebuffer"); 831 goto failed; 832 } 833 834 return 0; 835 836 failed: 837 if (fbdev->lcdclk) { 838 clk_disable_unprepare(fbdev->lcdclk); 839 clk_put(fbdev->lcdclk); 840 } 841 if (fbdev->info.cmap.len != 0) { 842 fb_dealloc_cmap(&fbdev->info.cmap); 843 } 844 845 return -ENODEV; 846 } 847 848 static void au1100fb_drv_remove(struct platform_device *dev) 849 { 850 struct au1100fb_device *fbdev = NULL; 851 852 fbdev = platform_get_drvdata(dev); 853 854 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) 855 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 856 #endif 857 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; 858 859 /* Clean up all probe data */ 860 unregister_framebuffer(&fbdev->info); 861 862 fb_dealloc_cmap(&fbdev->info.cmap); 863 864 if (fbdev->lcdclk) { 865 clk_disable_unprepare(fbdev->lcdclk); 866 clk_put(fbdev->lcdclk); 867 } 868 } 869 870 #ifdef CONFIG_PM 871 static int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) 872 { 873 struct au1100fb_device *fbdev = platform_get_drvdata(dev); 874 875 if (!fbdev) 876 return 0; 877 878 /* Blank the LCD */ 879 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); 880 881 clk_disable(fbdev->lcdclk); 882 883 memcpy(&fbdev->pm_regs, fbdev->regs, sizeof(struct au1100fb_regs)); 884 885 return 0; 886 } 887 888 static int au1100fb_drv_resume(struct platform_device *dev) 889 { 890 struct au1100fb_device *fbdev = platform_get_drvdata(dev); 891 int ret; 892 893 if (!fbdev) 894 return 0; 895 896 memcpy(fbdev->regs, &fbdev->pm_regs, sizeof(struct au1100fb_regs)); 897 898 ret = clk_enable(fbdev->lcdclk); 899 if (ret) 900 return ret; 901 902 /* Unblank the LCD */ 903 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info); 904 905 return 0; 906 } 907 #else 908 #define au1100fb_drv_suspend NULL 909 #define au1100fb_drv_resume NULL 910 #endif 911 912 static struct platform_driver au1100fb_driver = { 913 .driver = { 914 .name = "au1100-lcd", 915 }, 916 .probe = au1100fb_drv_probe, 917 .remove = au1100fb_drv_remove, 918 .suspend = au1100fb_drv_suspend, 919 .resume = au1100fb_drv_resume, 920 }; 921 module_platform_driver(au1100fb_driver); 922 923 MODULE_DESCRIPTION(DRIVER_DESC); 924 MODULE_LICENSE("GPL"); 925